I cannot see the comments of the Quick Cache plugin

Hello,

I installed and enabled the quick cache plugin. I clean cookies and logout as requested. However, when i navigate to my site i cannot see the comments of the plugin at the bottom of the page.

<!-- Quick Cache file path:...
My site is https://www.e-learning-education.gr/

Any help please?
Thank you

https://www.ads-software.com/plugins/quick-cache/